Carbon or copying paper



Aug. 17 1926.

w. ESCAMILLA CARBON OR COPYING PAPER Filed Sept. 29. 1924 .4727 ex 4 y 1 Patented Aug. 17, 1926.

1,596,519 UNITED STATES PATENT OFFICE.

WILLIAM ESCAMILLA, OF MEXICO, MEXICO, ASSIGNOB, BY MESNE ASSIGNMENTS, TO TAB-EDGED SYSTEM, INC., A COBPOBATIOR OF NEW YORK.

CARBON 0B COPYING PAPER.

Application filed September 29, 1924. Serial No. 740,458.

This invention relates to improvements in carbon or other copying paper for thepurpose of enablino one or more sheets of such paper to be readily and expeditiously withdrawn from between sheets of typewriting or other writing or letter paper after the desired impressions have been made, to the end that the carbon orcopying paper can be separated for subsequent use.

It is the usual practlce when making one or more carbons to use carbon or copying paper of a size substantially coextensive with the paper. on which the impressions are to be made and since the copying substance is more or less sticky or tacky in character, the separation of the sheets after impressions have been made constitutes a time consuming annoyance which it is the object of the resent invention to obviate.

To this end: the invention consists in associating with one' edge of the sheet of carbon or copying paper a tab or projection adapted to extend sufiiciently beyond the edges of the associated sheets of writing or 'typewriting paper to be readily gras ed for the purpose of withdrawing the car on paper from between'the sheets of paper on which the impressions have been made, while maintaining both sides of sheets individually in alinement. To facilitate this withdrawing of the carbon or copying sheets the tab is preferably formed near one corner of each sheet of carbon paper while the diametrically opposite corner is preferably cut away to a limited extent, so that the writing and typewriting sheets may be gripped firmly together at its corner while the, tabs of the several carbon sheets are grasped and said latter sheets withdrawn.

This permits the sheets of each set to bekept in alinement. I

In practice, the tabs or projections of the carbon or copying sheets are left white. They are not coated with the copying substance, so that the sheets may be handled by these tabs without soiling the hands of the operator.

Of considerable ractical importance is the novel shaping o the tabs or projections, as well as the cut outs at the opposite corners of the carbon paper. The tabs or projections are so shaped that they will be devoid of weak points which might result in inadvertent tearing away of the tabs. The proportioning of these tabs and their shaping are carefully worked out to give a structure of maximum strength. Moreover, the shaping of such tabs is such as to eliminate the possibility of tearing them from the body of the sheets when passing the assembled carbon and typewritten sheets through a typewriting machine. I have further so proportioned the tabs as to give a visible Indication of the position of the paper in the machine whereby the operator using carbon paper embodying the present invention is noti ed of the app-roach of the bottom of the sheet through the ap earance of one portion of the tab and is 'su sequently or at a subsequent line on the typewritten page notified by the appearance of another portion of the tab that the last line has been reached. This greatly facilitates the work of the operator in keeping track of the position of the sheets in the machine and lends to uniformity of work.

Features of the invention, other than those specified, will be apparent from the hereinafter detailed description and claims, when read in conjunction with the accompanied drawings.

The accompanying drawings illustrate one practical embodiment of the present inyention, but the construction therein shown is to be understood as illustrative, only, and not as defining the limits of the invention.

F igure' 1 shows the preferred embodiment of the invention; and,

Figure 2 shows a modified form of the invention.

Referring to the drawings, 1 designates a sheet of carbon or other copying paper, one surface of the body of which is coated with a suitable transferring medium.. In general respects the body of this sheet is substantially identical with the carbon paper known to the art. 1

The invention consists in associating with one edge of the sheet a tab 2, which is preferably located at the lateral edge of the sheet and adjacent one corner thereof. The opposite corner of the sheet is preferably cut away as shown at 3, the shape of this cut out portion being preferably substan: tially one fourth of an ellipse. The purpose of so shaping the cut out 3 and proportioning it as shown in the drawing, is to make this cut out substantially conform to the contour of a finger tip so that when edge 6 of the tab. In practice, the top of a number of carbon sheets, such as shown in the drawings, are interposed between corresponding typcwriting or letter sheets, the juxtaposed corners of the letter sheets may be firmly gripped and held together in assemble-d relation without gripping the contiguous portions of the carbon sheets. In practice, this cut out 3 may be omitted and the sheet continued out to the corner as usual, or, if desired, the sheet may be perforated along the line 3, as shown best in Figure 2 so that the portion corresponding to the cut out 3 may be readily torn out by the ultimate purchaser in the event that the operator desires to utilize this feature of the invention. In practice, however, I prefer to make the sheets with the cut outs 3 as shown in the drawing.

The tab 2, which is located at the dia metrically opposite corner from the cut out 3 is carefully shaped and proportioned to fulfill a number of functions. It is made of sufficient length to provide a proper gri for the fingers and is so shaped that it a fords no sharp corners or weak spots at which tearing would be apt to occur. It is to be noted that the upper portion of the tab is cut on the line 4 which has such angular relation with the adjacent edge of the sheet 1 that the upper edge of the tab is sloping. This slope 1s carefully worked out to give a definite relationship between the sloped portion 5 and the vertical lateral the vertical portion 6 is located at a distance Y from the bottom of the sheet which distance is preferably in practice the distance which the last line of typewriting should occupy from the bottom of a typewritten sheet, while the sloped portion 5 is of such height that the distance Z is equal to the vertical spacing of one or more superimposed lines of typewriting on a typewritten sheet. When the arts are thus proportioned, the operator Wlll know that when the inclined portion 5 first comes into view in alinement with a line of typewriting that sheet will have space for a predetermined number of additional lines on the sheet on which impressions are being made.

When, however, the operator observes that the line which she is writing is in alinement with the upper end of the vertical portion 6 of the tab, that this line is the last line of typewriting that should be put on a sheet. Inasmuch as the tab is positioned in close proximity to the end of a typewriting line, the operator cannot fail to observe these relative positions and thus uniformity of several successive sheets of typewriting is assured.

Another important advantage of shaping the upper edge of the tab as shown resides in the fact that when thus shaped the tendency of the tab to catch while passing through a typewriter is obviated since the sloping edge will guide the tab in such manner as to preclude tearing thereof.

In practice, the tab is left uncoated so that the operator may grasp the same without soiling the fin ers. The use of carbon paper embodying the present invention will e apparent from whathas been stated and it will be manifest that after impressions have been made on assembled typewritten and carbon paper sheets and these sheets removed in assembled relation from the machine, the carbon sheets can be readily separated from the typewritten sheets b grasping the upper left hand corners o the assembled sheets in one hand, care being taken to grasp the immediate corner of the sheets so that pressure will be applied in the zone of the cut cuts 3 of the carbon sheets. If

the tabs of the various carbon sheets are col-' lectively grasped by the other hand and slight tension exerted in opposite directions, the carbon sheets will be withdrawnfrom the typewritten sheets leaving all of the typewritten sheets in alinement and all of the carbon sheets in alinement, and this operation is accomplished expeditiously and without soiling the operators hands.

In the preferred manner of carrying out this invention, the tab 2 is referably formed integral with thebody of the sheet 1. It is within the purview of the invention, however, to perforate along the base of the tab as shown at 7 in Figure 2 so that, if desired, the tab may be torn oil. It is also within the purview of this invention to.

form the tab separately from the material of which the sheet is formed and to glue or otherwise adhesively secure the tab to the body of the sheet 1.

As I have hereinbefore stated, the tabs of the carbon paper sheets are preferably left uncoated although, if desired, they may be coated without departin from the spirit of this invention. It is a so within the purview of this invention to leave the tabs uncoated and color them in some contrasting golor so that they will be more readily visi- Having thus fully described the invention, what I claim as new and desire to secure by Letters Patent is:

1. Carbon or copying paper provided at one corner with a tab extended beyond the lateral edge of the sheet in longitudinal direction and having its upper edge inclined downward and outward and its lower edge rounded.

2. Carbon or copying paper provided at one corner with a tab projected beyond the lateral edge of the sheet and extended in the direction of the length of the sheet, said tab extending to the end of the sheet and having its upper end tapered, thus being contructed to serve a triple function, namely,

to preclude tearing away of the tab, to noti-- fy the typist of the approach of the bottom of the sheet being written upon, and then to indicate the approach of the last line to 5 be written upon. a

3. Carbon or copyingpaper provided at one corner with a tab extending in the direction of the length of the sheet and beyond the lateral edge of said sheet, with its 11 per end 10 at an angle to the lateral edge of t e sheet,

the distance between the top and bottom edges of the angled portion being equal to the distance between two lines of type-writing, and the lower edge of such angled portion being such as to indicate that but one line only can be written on the sheet;

In testimony whereof I have signed the foregoing specification.

WILLIAM EsoAMiLLA. 

